Improvement in fire-proof walls for buildings



S. M. lGROFF.

Improvement in Fire-Proof Walls for Buildings.

Patented July 23,1872.

Inventor;

UNITED STATES PATENT OFFICE.

SAMUEL M. GEOFF, OF ELIZABETHTOWN, PENNSYLVANIA.

IMPROVEMENT iN FlRE PROCF WALLS FOR BUILDINGS.

' Specification forming part of Letters Patent Nor 129,659, dated July23, 1872.

' nature of my invention.

Figure 1 shows a portion of a wall with the cast-iron cells 2 3 in placein combination with common brick, 4. Fig. 2 shows the top or threecelledsquare box, open at both top and bottom. Fig. 3 shows a triangularbox-front,full length of Fig. 2, having a central partition, and used toallow space for the binding at regular intervals with the bricksemployed.

These open cells,Fig. 2, may be of the shape and size of the brick used,or double; the size is not material, provided they are proportioned towork even with the brick used.

In Fig. 2 I show three cells. The detached wings W shown may, in themolding, be inserted so as to be attached in the cast for binders,fo1*the purpose of inserting a brick endwise at certain points, and crossingin the next tier, and thereby secure a firm connection of the wall; or Iemploy instead, for that purpose, the two-celled triangular box, Fig. 3.This admits of various applications for binding the cast material withthe brick and to leave a uniform compact metallic front, bound by thefilling in of the interchangeable cells with concrete, forming a unionbetween the several tiers of an indestructible material, more enduringthan ordinary brick, and altogether calculated to make a neat andmoderately-cheap fire-proof wall.

It is believed that such a wall would have availed in the fiery ordealof Chicago.

I am aware of the previous use of plates with rabbets and tongues toform hollow walls or cast-iron buildings,.as well as otherwiseformedcast-iron building-pieces, and such as cast-iron shells havingprojections and holes in them; but I am not aware of any such castpieces of two or three cells of a single piece, made in the manner andfor the purpose shown and described.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of cast pieces 2 and 3 with" their respective cells,cast in a single piece, either as an oblong square or triangle, asshown, used jointly or separately with ordinary brick, for the purposespecified.

SAMUEL M. GROFF. Witnesses:

D. W. BALMER, F. H. PEIRoE.

